The quantitation of how much time constitutes short and recent varies by disease and by context, but the core denotation of acute is always qualitatively in contrast with chronic, which denotes long-lasting disease (for example, in acute leukemia and chronic leukemia).
View full size image. Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.
The first electric light bulb was invented in 1809 by Humphrey Davy. It was perfected by Thomas Edison. It is one of the conveniences that changed the way we do things in everyday life. Incandescence is the emission of light when heated to a very high temperature. Incandescence bulb works on the same principle, when a filament is heated to a high temperature it produces light. The first electric light bulb was invented in 1809 by Humphrey Davy. It was perfected by Thomas Edison. It is one of the conveniences that changed the way we do things in everyday life.